I did some playing with the style of logic you are talking about.

In the style of logic I am used to thinking about an error would 'stop' your code execution. Which in some cases is good and in some cases is bad. The style of allowing it to be seperate acutally requires the programmer to follow proper structure or an error could be missed and all could be thought well.
I have to admin I had not looked at the method of how kix handles errors until just now. It is flexible, but I am going to have to go back and modify the few scripts I have done to allow for errors in them. I am less safe than I was thinking without those error handlers.